n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 1 |
4 | 2 |
5 | 2 |
6 | 8 |
7 | 8 |
8 | 30 |
9 | 72 |
10 | 408 |
11 | 408 |
12 | 4104 |
13 | 4104 |
14 | 29640 |
15 | 208704 |
16 | 1437312 |
17 | 1437312 |
18 | 22653504 |
19 | 22653504 |
20 | 318695040 |
21 | 2686493376 |
22 | 27628410816 |
23 | 27628410816 |
24 | 575372874240 |
25 | 1775480841216 |
26 | 21115550048256 |
27 | 132879856582656 |
28 | 2321256928702464 |
29 | 2321256928702464 |
30 | 83095013944442880 |
[1,1,1,1,2,2,8,8,30,72,408,408,4104,4104,29640, 208704,1437312,1437312,22653504,22653504, 318695040,2686493376,27628410816,27628410816, 575372874240,1775480841216,21115550048256, 132879856582656,2321256928702464,2321256928702464, 83095013944442880] |